Joanna Beth "Jo" Harvelle is a fictional character on The CW Television Network's drama/horror television series Supernatural portrayed by Alona Tal. Aspiring to be a hunter of supernatural creatures like her parents, she was introduced in the second season in order to explore a mother-daughter relationship in the hunting world. Jo was originally intended to serve as a love interest for lead character Dean Winchester, but instead turned into a sister-like figure for him.